Quiting Smoking Help!

Hi all. So, I'm having extreme difficulty quitting smoking, I've successfully cut down a lot (from 4+ packs daily to less then 1 daily) but. I'm having trouble giving up that last pack. Any tips you have would be helpful. Please don't just comment "do it for your baby" ect. Because, as horrible as it sounds, that doesn't help me at all. I have borderline personality disorder, which gives me an extremely addictive personality, horrific impulse control, and my mind automatically rationalizes everything I do, even when I KNOW it's bad. If you have any ways or tips that could help, besides willpower, please comment below. I am trying ridiculously hard, but willpower is NOT enough. I'm (according to glow) 4 wks + 5 days. Thank you!